So I just started dating this amazing guy who had a BMT when he was between the ages of 16-18. Recently, he got an analysis that showed he had a 0 sperm count. I'm guessing the full body irradiation before the BMT is the cause of this. Do you guys know if there is any hope for him to father a child ? I have heard of ICSI treatment but I'm not sure if that works for guys who are no longer producing sperm at all. Does anyone know ? Any stories ?